Isabelle, Isobel, Isabel, Bella, Isabella - they are all extremely popular at the moment. In Victoria in 2008, Isabella was the 4th most popular name for a girl, while Isabelle was 24th and Isabel was 70th or thereabouts. Check the WA births registry and I suspect you will have the same sort of result....

Funny how names pan out. Flynn was 73rd when we chose it and is slowly dropping in popularity, but Oliver is climbing. I wanted Rex, though........!